An enigmatic ammonite from Mont Raynaud, Madagascar, originally referred to the Upper Cenomanian Calycoceras (Calycoceras ) naviculare (Mantell, 1822) is associated with an exclusively upper Upper Albian fauna. It is interpreted as a new, hypermorphic giant species of Salaziceras Breistroffer, 1936, S. lemoinei.

We thank the late H. Gauthier for arranging access to the Sorbonne Collections, and the staff of the Department of Earth Sciences, Oxford, and the Geological Collections, Oxford University Museum ofNatural History, for technical support.